HDH공정에 의한 티타늄 분말제조 및 소결특성

최정철; 장세훈; 차용훈; 오익현; Jung-Chul Choi; Se-Hun Chang; Young- Hoon Cha; Ik-Hyun Oh

Korean Journal of Materials Research, Vol.19, No.2, 55-60, February, 2009

DOI10.3740/MRSK.2009.19.2.055 Export Citation

HDH공정에 의한 티타늄 분말제조 및 소결특성

Sintering Characterization of Ti Powder Prepared by HDH Process.

최정철, 장세훈, 차용훈¹, 오익현^†

한국생산기술연구원
¹조선대학교 기계공학과

Jung-Chul Choi, Se-Hun Chang, Young- Hoon Cha¹, and Ik-Hyun Oh^†

Korea Institute of Industrial Technology (KITECH), Gwangju 500-480, Korea
¹Department of Mechanical Engineering, Chosun University, Gwangju, Korea

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In this study, Ti powder was fabricated from Ti scrap by a hydrogenation-dehydrogenation (HDH) method. The Ti powders were compacted by Spark plasma sintering (SPS) and the microstructure and mechanical properties of the powders were investigated. A hydrogenation reaction of Ti scrap occurred at temperatures near 450 oC with a sudden increase in the reaction temperature and a decrease in the pressure of the hydrogen gas as measured in a furnace during the hydrogenation process. In addition, a dehydrogenation process was carried out at 750 oC for 2hrs in a vacuum of 10-4torr. The Ti powder sizes obtained by hydrogenation-dehydrogenation and mechanical milling processes were in the range of 1~90 μm and 1~100 μm, respectively. To fabricate Ti compacts, Ti powders were sintered under an applied uniaxial punch pressure of 40 MPa at in a range of 900~1200 oC for 5 min. The relative density of a SPSed compact was 99.6% at 1100 oC, and the tensile strength decreased with an increase in the sintering temperature. However, the hardness increased as the sintering temperature increased.

Keywords:Ti scrap;Ti powder;HDH;Spark plasma sintering

[References]

Kim WB, Choi GS, Suh CC, Kil DS, Ha H, J. Kor, Mat. Res, 9(3), 282 (1998)
Ahn DK, Hur BY, Kim SY, Park SH, Ahn HJ, Park SJ, J. Kor. Inst. Met&Mater., 40(8), 915 (2002)
Zhenh H, Okabe TH, Alloys J, Compounds., JALCOM-16619, 1-8 (2007). (2007)
Jang JM, Lee W, Ko SH, J. Kor. Pow. Met. Inst.,PA02-W-13, 969-970(2006). (2006)
Kim YJ, J. Kor. Pow. Met. Inst., 11(3), 265 (2004)
Choe JS, Lee DH, Choi GS, Kil DS, Suh CY, Kim W, Ha H, Korean J. Mater. Res., 10(7), 464 (2000)
Bhosle V, Baburaj EG, Miranova M, Salama K, Mater. Eng. A, 356, 190 (2003)
Ha H, Park SS, Lee HC, J. Korean Ind. Eng. Chem., 5(2), 263 (1994)
Azevedo CRF, Rodrigues D, Neto FB, J. Alloy and Compounds., 353, 217 (2003)
Boyney R, Welsch G, Collings EW, (Materials Properties Handbook : Titanium Alloys, ASM International, USA ,1994) p. 165. (1994)

[Referenced By]

[1] Kim WB, Choi GS, Suh CC, Kil DS, Ha H, J. Kor, Mat. Res, 9(3), 282 (1998)

[2] Ahn DK, Hur BY, Kim SY, Park SH, Ahn HJ, Park SJ, J. Kor. Inst. Met&Mater., 40(8), 915 (2002)

[3] Zhenh H, Okabe TH, Alloys J, Compounds., JALCOM-16619, 1-8 (2007). (2007)

[4] Jang JM, Lee W, Ko SH, J. Kor. Pow. Met. Inst.,PA02-W-13, 969-970(2006). (2006)

[5] Kim YJ, J. Kor. Pow. Met. Inst., 11(3), 265 (2004)

[6] Choe JS, Lee DH, Choi GS, Kil DS, Suh CY, Kim W, Ha H, Korean J. Mater. Res., 10(7), 464 (2000)

[7] Bhosle V, Baburaj EG, Miranova M, Salama K, Mater. Eng. A, 356, 190 (2003)

[8] Ha H, Park SS, Lee HC, J. Korean Ind. Eng. Chem., 5(2), 263 (1994)

[9] Azevedo CRF, Rodrigues D, Neto FB, J. Alloy and Compounds., 353, 217 (2003)

[10] Boyney R, Welsch G, Collings EW, (Materials Properties Handbook : Titanium Alloys, ASM International, USA ,1994) p. 165. (1994)